3 years ago

Round off each of the number correct to 2s.f and 3s.f a. 0.0861b. 19.278

Mathematics

1 answer:

ivanzaharov [21]3 years ago

5 0

Answer:

Step-by-step explanation:

a) 2sf = 0.086

3sf = 0.0861

b) 2sf = 19

3sf = 19.3

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A country's population in 1994 was 182 million. In 2002 it was 186 million. Estimate the population in 2004 using the exponentia

iogann1982 [59]

$\bf =ae^{kt}\qquad 
\begin{cases}
1994\impliedby \textit{year 0, starting point}\\
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\end{cases}\implies 182=ae^{k0}
\\\\\\
182=a\cdot e^0\implies 182=a\cdot 1\implies 182=a
\\\\\\
thus\qquad P=182e^{kt}\\\\
-------------------------------\\\\$

$\bf P=182e^{kt}\qquad 
\begin{cases}
2002\impliedby \textit{8 years later}\\
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\\\\\\
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\\\\\\
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what's the population in 2004? well, from 1994 to 2004 is 10 years later, so t = 10

plug that in, to get P for 2004

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